export interface StoredSession {
    sessionId: string;
    lastActivityTimestamp: number;
    sessionStartTimestamp: number;
}
/**
 * Session identity is shared across browser tabs via a localStorage blob
 * (matching GA/PostHog). When a tab's in-memory session goes stale, it must
 * adopt the shared session another tab kept alive instead of minting a
 * competitor. A stored session is adoptable when it is a different, still
 * live (not idle-expired, not over max length) session.
 */
export declare function isAdoptableSharedSession(stored: Partial<StoredSession> | null | undefined, currentSessionId: string | undefined, now: number, idleTimeoutMs: number, maxLengthMs: number): stored is StoredSession;
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